1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
import logging
from threading import Thread, Event
from .exceptions import ConnectionError, TimeoutError
class HeartbeatThread(Thread):
daemon = True
def __init__(
self, send_heartbeat,
relax_interval_in_seconds,
hurry_interval_in_seconds):
super(HeartbeatThread, self).__init__()
self._send_heartbeat = send_heartbeat
self._relax_interval_in_seconds = relax_interval_in_seconds
self._hurry_interval_in_seconds = hurry_interval_in_seconds
self._adrenaline = Event()
self._rest = Event()
self._halt = Event()
def run(self):
try:
while not self._halt.is_set():
try:
self._send_heartbeat()
except TimeoutError:
pass
if self._adrenaline.is_set():
interval_in_seconds = self._hurry_interval_in_seconds
else:
interval_in_seconds = self._relax_interval_in_seconds
self._rest.wait(interval_in_seconds)
except ConnectionError:
logging.debug('[heartbeat connection error]')
def relax(self):
self._adrenaline.clear()
def hurry(self):
self._adrenaline.set()
self._rest.set()
self._rest.clear()
@property
def hurried(self):
return self._adrenaline.is_set()
def halt(self):
self._rest.set()
self._halt.set()
|
